My whole life, I've been a good girl, following rules and obeying guidelines like they were second nature to me. I'm even a twenty-two-year-old virgin, and good is my middle name. But then, I break one tiny little rule – a minuscule, inconsequential one – and the next thing I know, I'm trapped with an incredibly handsome stranger.

This stranger has eyes like cut emeralds, biceps that make my head spin, and a smile that has me rethinking all my life choices. We escape a bar bathroom together and go on an impromptu date, sharing the hottest kiss I've ever had, one that leaves me panting for more. We promise to see each other again, and as it turns out, we see each other the very next morning, in my calculus class – which he's teaching.

Teach me everything, I think to myself. My handsome, sexy date is Professor Loveless, and we'll be seeing each other plenty, every Monday, Wednesday, and Friday all semester long. There's no choice but to call it off; we both have too much at stake – I could lose my scholarship, and he could lose his entire career. But I can't call off the way I feel, the way he looks when he rolls up his sleeves and explains imaginary numbers, the heated glances, or the memory of his body pressing against mine that night.

I'm a virgin, and he's my professor. If we give in, it could cost us both everything. But I'm so tired of being a good girl. The Hookup Equation is the fourth book in the Loveless Brothers series, and can be read as a total standalone. It's for fans of high-heat, low-angst romantic comedies and anyone who's ever been hot for teacher. This one's got tons of forbidden steam, a high-stakes secret relationship, sibling banter, a heroine who really enjoys her first time, and a college setting that will make you feel like you're back on campus. There's an HEA, of course. (And yes, it bangs.)

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